diff --git a/kernel/src/arch/PCI.cpp b/kernel/src/arch/PCI.cpp
index b1e89f71..25c0cc3b 100644
--- a/kernel/src/arch/PCI.cpp
+++ b/kernel/src/arch/PCI.cpp
@@ -11,16 +11,16 @@ namespace PCI
 {
     Device::ID read_id(const Device::Address& address)
     {
-        u16 vendor = read16(address, Field::VendorID);
-        u16 device = read16(address, Field::DeviceID);
+        const u16 vendor = read16(address, Field::VendorID);
+        const u16 device = read16(address, Field::DeviceID);
         return { vendor, device };
     }
 
     Device::Type read_type(const Device::Address& address)
     {
-        u8 klass = read8(address, Field::Class);
-        u8 subclass = read8(address, Field::Subclass);
-        u8 prog_if = read8(address, Field::ProgIF);
+        const u8 klass = read8(address, Field::Class);
+        const u8 subclass = read8(address, Field::Subclass);
+        const u8 prog_if = read8(address, Field::ProgIF);
         return { klass, subclass, prog_if };
     }
 
@@ -45,8 +45,8 @@ namespace PCI
 
     void scan_function(const Device::Address& address, ScanInfo info)
     {
-        Device::ID id = read_id(address);
-        Device::Type type = read_type(address);
+        const Device::ID id = read_id(address);
+        const Device::Type type = read_type(address);
 
         if (matches(type, info.match)) { info.callback({ id, type, address }); }
 
@@ -66,7 +66,7 @@ namespace PCI
 
         scan_function(address, info);
 
-        u8 header_type = read8(address, Field::HeaderType);
+        const u8 header_type = read8(address, Field::HeaderType);
 
         // Multiple-function PCI device
         if ((header_type & 0x80) == 0x80)
@@ -87,7 +87,7 @@ namespace PCI
 
     void scan(Callback callback, Match match)
     {
-        u8 header_type = read8({ 0, 0, 0 }, Field::HeaderType);
+        const u8 header_type = read8({ 0, 0, 0 }, Field::HeaderType);
 
         // Single-function PCI bus
         if ((header_type & 0x80) == 0)